Jeff Davis <pgsql(at)j-davis(dot)com> writes:
> To make that interpretation work I think you would need to say that
> ROW(NULL,NULL) _is_ the null value,
Right...
> and you would have to allow things like:
> select 1 + row(null,null);
Eh? It's a null value of a composite type. The above is a type
violation.
regards, tom lane